isInteger(value, [minValue], [maxValue]) Last updated: 02. Dec 2025

Checks if specified value is an int.

Parameters

Name	Type	Description
value	object	Value to validate.
minValue (optional)	number	Specify a minimum value for the number or "null" to skip.
maxValue (optional)	number	Specify a maximum value for the number or "null" to skip.

Returns

Returns true if value is a number (within the specified range).

Example

Code example (JS)

JS is normal JavaScript either running in the browser or on the Docly™ server.

let t = "5.5";

if (!docly.isInteger(t))
    write("'" + t+ "' is not an integer \n");

let n = "123";
if (docly.isInteger(n, 100, 200))
    write("123 is an integer between 100 and 200\n");
    
if (!docly.isInteger(n, 1, 10))
    write("123 is NOT a integer between 1 and 10");

Output

The JS code above produces the output shown below:

'5.5' is not an integer 
123 is an integer between 100 and 200
123 is NOT a integer between 1 and 10